Blind cord winder fixing structure

ABSTRACT

A blind cord winder fixing structure including a fixing body, a shaft gear, a cord winder, a movable cover and a locating cover board having a central stem. The fixing body is composed of a first case body and a second case body mated with each other. Inner faces of the first and second case bodies are formed with complementary arced recesses, which together form a passage. A shaft rod is rotatably received in the passage. The shaft rod has a worm section engaged with the shaft gear. Lower sides of the first and second case bodies are respectively formed with projecting shafts fitted in a sleeve of the movable cover, which supports the cord winder. The stem of the locating cover board is received in a circular hole of the fixing body. The locating cover board is horizontally rotatable, whereby two arced bracket sections of two ends of the locating cover board can be moved into a blind rail rack and engaged therewith to fixedly locate the fixing body in the blind rail rack.

FIELD OF THE INVENTION

The present invention is related to a blind cord winder fixing structure for fixedly locating a blind cord winder in a blind rail rack.

BACKGROUND OF THE INVENTION

FIG. 1 shows a conventional method for fixing a blind cord winder on a blind rail rack. A metal-made fixing bar A2 is integrally formed on upper side of the cord winder A1. Two ends of the fixing bar A2 are respectively formed with chuck sections A3 in which the rail rack A4 is chucked and fixed. In installation, the rail rack A4 must be first pulled and deflected outward to place the cord winder A1 into the rail rack A4. Then the rail rack A4 is released and fixedly chucked into the chuck sections A3 of the fixing bar A2. According to the conventional fixing method, it is quite inconvenient to install and fix the blind cord winder on the blind rail rack. Moreover, in installation, the blind rail rack A4 is likely to deform due to the pulling force.

FIG. 2 shows another method for fixing a blind cord winder on a blind rail rack. A movable fixing bar B1 is rotatably disposed on upper side of the cord winder. A front end of the fixing bar B1 has a fixing bracket section B2. The bracket section B2 can be downward pressed to latch and engage with the rail rack B3. According to this method, when detaching the cord winder, it is still necessary to outward pull and deflect the rail rack B3. Therefore, it is quite inconvenient to disassemble the cord winder. Moreover, the rail rack B3 is still likely to deform due to the pulling force.

SUMMARY OF THE INVENTION

It is therefore a primary object of the present invention to provide a blind cord winder fixing structure including a fixing body. The fixing body is formed with a circular through hole. A central stem of a locating cover board is fitted through the circular hole of the fixing body. The locating cover board is horizontally rotatable, whereby two arced bracket sections of two ends of the locating cover board can be moved into a blind rail rack and engaged therewith to fixedly locate the fixing body in the blind rail rack. Therefore, the fixing body is restricted from moving within the blind rail rack.

It is a further object of the present invention to provide the above blind cord winder fixing structure in which upper end of the fixing body is formed with a protrusion for restricting the locating cover board from transversely moving.

The present invention can be best understood through the following description and accompanying drawings wherein:

BRIEF DESCRIPTION OF THE DRAWINGS

FIG. 1 is a perspective view of a conventional blind cord winder fixing structure;

FIG. 2 is a sectional view of another conventional blind cord winder fixing structure;

FIG. 3 is a perspective exploded view of the present invention;

FIG. 4 is a sectional assembled view of the present invention;

FIG. 5 is a sectional view of the locating cover board of the present invention;

FIG. 6 is a perspective assembled view of the present invention;

FIG. 7 is a sectional view showing that the present invention is installed in a blind rail rack;

FIG. 8 is a top view showing the rotation of the locating cover board of the present invention;

FIG. 9 is a perspective view showing the installation of the present invention in the blind rail rack; and

FIG. 10 is a perspective view according to FIG. 9, showing that the installation of the present invention is completed.

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS

Please refer to FIGS. 3 and 4. The present invention mainly includes a fixing body 1, a shaft gear 2, a cord winder 3, a movable cover 4 and a locating cover board 5.

The fixing body 1 is composed of a first case body 10 and a second case body 11, which are mated with each other. Inner faces of the first and second case bodies 10, 11 are respectively formed with multiple fixing holes 104, 113. Threaded rods 105 can be screwed through the fixing holes 104, 113 to fixedly assemble the first and second case bodies 10, 11 with each other. Each of the first and second case bodies 10, 11 has an upper end, which is formed with a protrusion 100, 110 with smaller area. Upper walls of the protrusions 100, 110 are respectively formed with semicircular notches 102, 112, which are complementary to each other. When the first and second case bodies 10, 11 are assembled with each other, the semicircular notches 102, 112 together form a circular hole. In addition, upper sides of inner faces of the first and second case bodies 10, 11 are respectively formed with shaft holes 101, 111 for accommodating the shaft gear 2 therein. A middle portion of the inner face of the second case body 11 is formed with arced recesses 102. A middle portion of the inner face of the first case body 10 is also formed with arced recesses (not shown) complementary to the arced recesses 102 of the second case body 11. When the first and second case bodies 10, 11 are mated with each other, the arced recesses together form passages. The cord winder 3 has a shaft rod 31 extending from a first side thereof. The shaft rod 31 has a worm section 30 and is rotatably received in the passages. Lower corners of the first and second case bodies 10, 11 are respectively formed with inward projecting shafts 103, 11 opposite to each other. The movable cover 4 has a tail end formed with a sleeve 40. The projecting shafts 103, 115 are fitted in a central shaft hole 41 of the sleeve 40, whereby the movable cover 4 can be downward pivoted about the projecting shafts. Projections 114 respectively project from certain portions of outer faces of the first and second case bodies 10, 11 for blocking a gap between the cord winder 3 and the first and second case bodies 10, 11.

The shaft gear 2 is received in the shaft holes 101, 111 of the first and second case bodies 10, 11. The shaft gear 2 is formed with a central through hole 201 for a shaft to pass therethrough.

The shaft gear 2 has multiple gear teeth 20 annularly arranged on an outer circumference of the shaft gear 2. When the first and second case bodies 10, 11 are mated with each other, the gear teeth 20 and the worm section 30 of the shaft rod 31 of the cord winder 3 are positioned in the fixing body 1 and engaged with each other.

The shaft rod 31 with the worm section 30 extends from the first side of the cord winder 3. The cord winder 3 further has a cord reel 32 on a second side. A pull cord 6 is wound on the cord reel 32. The cord reel 32 has two disc sections 33, 34 on two sides respectively. The cord reel 32 is formed with a through hole 35 between the disc sections 33, 34 for fixing the pull cord 6 therein. Accordingly, the pull cord 6 can be fixed with the cord reel 32.

As aforesaid, the sleeve 40 is formed at the tail end of the movable cover 4 and has the central shaft hole 41. The projecting shafts 103, 115 of the first and second case bodies 10, 11 are fitted in the shaft hole 41. The movable cover 4 further has a support board 410 transversely extending from a lower end of the sleeve 40. The support board 410 is formed with through holes 42, 43 for two ends of the pull cord 6 to pass therethrough. A fixing board 44 is further formed under the support board 41. A front end of the fixing board 44 has a lip section 45 for engaging in a fixing hole 72 preformed on a blind rail rack 7 (as shown in FIG. 7).

A lower side of the locating cover board 5 is formed with an insertion recess 50 (as shown in FIG. 5) in which the protrusions 100, 110 of the first and second case bodies 10, 11 are inserted and fitted. A central stem 500 downward extends from the locating cover board 5 and is positioned at a center of the insertion recess 50. A stopper section 501 with larger diameter is formed at a lower end of the central stem 500. The central stem 500 is held in the circular hole defined by the first and second case bodies 10, 11. The stopper section 501 prevents the locating cover board 5 from detaching from the first and second case bodies 10, 11. Accordingly, the locating cover board 5 can be horizontally rotated. Two ends of the locating cover board 5 are respectively formed with arced bracket sections 51, 52. Lower sides of the arced bracket sections 51, 52 are respectively formed with arced portions 53, 520. Upper sides of the aced bracket sections 51, 52 are respectively formed with platforms 54, 521. A stopper block 530 is formed under the lower side of the arced bracket section 51. The blind rail rack 7 has two bight edges 70. The arced bracket sections 51, 52 can fixedly engaged under the bight edges 70 to fix the blind cord winder structure (as shown in FIG. 6) with the blind rail rack 7.

When installing the cord winder in the blind rail rack 7, the pull cord 6 is quickly wound on the cord reel 32 through a winding space above the cord winder 3. Then the pull cord 6 is passed through the through holes 42, 43 of the support board 41 of the movable cover 4. Then the pull cord 6 is passed through the fixing hole 72 of the blind rail rack 7. Then, by means of the lip section 45 of the fixing board 44 of the movable cover 4, the fixing board 44 is engaged in the fixing hole 72 of the blind rail rack 7 (as shown in FIG. 7). Then the locating cover board 5 is manually operated to horizontally rotate clockwise or counterclockwise (as shown in FIG. 8). At this time, the arced bracket sections 51, 52 of two ends of the locating cover board 5 are moved under the bight edges 70 of the blind rail rack 7. Accordingly, the platforms 54, 521 of the arced bracket sections 51, 52 are engaged under the bight edges 70 of the blind rail rack 7 to fix the cord winder structure in the blind rail rack 7. Therefore, the fixing body 1 is restricted from moving within the blind rail rack 7 (as shown in FIGS. 9 and 10).

The above embodiments are only used to illustrate the present invention, not intended to limit the scope thereof. Many modifications of the above embodiments can be made without departing from the spirit of the present invention. 

1. A blind cord winder fixing structure comprising: a fixing body including a first case body and a second case body corresponding to the first case body in configuration, inner faces of the first and second case bodies being respectively formed with several fixing holes, whereby threaded rods can be screwed through the fixing holes to fixedly assemble the first and second case bodies with each other, upper walls of the first and second case bodies being respectively formed with semicircular notches, which are complementary to each other, whereby when the first and second case bodies are assembled with each other, the semicircular notches together form a circular hole; a locating cover board having a stem downward extending from the locating cover board, the stem being fitted through the circular hole of the defined by the first and second case bodies, whereby the locating cover board is horizontally rotatable, two ends of the locating cover board being respectively formed with arced bracket sections, upper sides of the aced bracket sections being respectively formed with platforms; a shaft gear received in and positioned between two shaft holes formed on inner faces of the first and second case bodies, the shaft gear having multiple gear teeth; a cord winder including a shaft rod having a worm section and a cord reel having two disc sections on two sides, the shaft rod extending from one of the disc sections, the worm section of the shaft rod being engaged with the gear teeth of the shaft gear; and a movable cover having a sleeve and a support board horizontally extending from a lower end of the sleeve, the sleeve having a shaft hole, lower sides of the first and second case bodies being respectively formed with projecting shafts, the projecting shafts being fitted in the shaft hole of the sleeve, the stem of the locating cover board being received in the circular hole of the fixing body to prevent the locating cover board from detaching from the fixing body, the locating cover board being horizontally rotatable to fixedly engage and locate the fixing body in a blind rail rack.
 2. The blind cord winder fixing structure as claimed in claim 1, wherein a stopper section with larger diameter is formed at a bottom end of the stem of the locating cover board. 